Our life is depended on these trees.
if they are not there then we won't be there.
they give us oxygen.
they give us food .
trees reduce air pollution.
The role of trees and forests in our ecosystems is absolutely critical. Forests renew our air supply by absorbing carbon dioxide and producing oxygen. Trees also clean our atmosphere by intercepting airborne particles, and by absorbing ground-level ozone, carbon monoxide, sulfur dioxide, and other greenhouse gases. A single tree can absorb 10 pounds of air pollutants a year, and produce nearly 260 pounds of oxygen- enough to support two people.